Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.Statement;

public class Main {
    public static void main(String[] args) throws Exception {
        Connection conn = getHSQLConnection();
        System.out.println("Got Connection.");
        Statement st = conn.createStatement();
        st.executeUpdate("create table survey (id int,name varchar);");
        st.executeUpdate("create view surveyView as (select * from survey);");
        st.executeUpdate("insert into survey (id,name ) values (1,'nameValue')");
        st.executeUpdate("insert into survey (id,name ) values (2,'anotherValue')");

        ResultSet rs = null;
        PreparedStatement ps = null;

        String query = "select id, name from survey where id = ?";

        ps = conn.prepareStatement(query);
        // specify values for all input parameters
        ps.setInt(1, 001); // set the first parameter: id

        // now, PreparedStatement object is ready to be executed.
        rs = ps.executeQuery();
        // iterate the result set object
        while (rs.next()) {
            int id = rs.getInt(1);
            String name = rs.getString(2);
            System.out.println("[id=" + id + "][name=" + name + "]");
        }

        // NOTE: you may use PreparedStatement as many times as you want
        // here we use it for another set of parameters:
        ps.setInt(1, 002); // set the first parameter: id

        // now, PreparedStatement object is ready to be executed.
        rs = ps.executeQuery();
        // iterate the result set object
        while (rs.next()) {
            int id = rs.getInt(1);
            String name = rs.getString(2);
            System.out.println("[id=" + id + "][name=" + name + "]");
        }
        rs.close();
        ps.close();
        conn.close();

    }

    private static Connection getHSQLConnection() throws Exception {
        Class.forName("org.hsqldb.jdbcDriver");
        System.out.println("Driver Loaded.");
        String url = "jdbc:hsqldb:data/tutorial";
        return DriverManager.getConnection(url, "sa", "");
    }

    public static Connection getMySqlConnection() throws Exception {
        String driver = "org.gjt.mm.mysql.Driver";
        String url = "jdbc:mysql://localhost/demo2s";
        String username = "oost";
        String password = "oost";

        Class.forName(driver);
        Connection conn = DriverManager.getConnection(url, username, password);
        return conn;
    }

    public static Connection getOracleConnection() throws Exception {
        String driver = "oracle.jdbc.driver.OracleDriver";
        String url = "jdbc:oracle:thin:@localhost:1521:caspian";
        String username = "mp";
        String password = "mp2";

        Class.forName(driver); // load Oracle driver
        Connection conn = DriverManager.getConnection(url, username, password);
        return conn;
    }
}